MergeROI Task

This task performs a union or intersection of multiple ROI geometries into a single output ROI, Note that this task only works with geometry and will ignore ROIs that contain pixels or thresholds in their definitions.

Example

; Start the application

e = ENVI()

; Open an input file

File = Filepath('qb_boulder_roi.xml', Subdir=['data'], $

Root_Dir=e.Root_Dir)

Regions = e.OpenROI(File)

; Get the task from the catalog of ENVITasks

Task = ENVITask('MergeROI')

; Define inputs

Task.INPUT_ROIS = Regions

Task.OPERATION = 'Union'

Task.ROI_COLOR = [200,0,0]

Task.ROI_NAME = 'Union Example'

; Run the task

Task.Execute

; Add the output to the Data Manager

e.Data.Add, Task.OUTPUT_ROI

; Display the result

RasterFile = Filepath('qb_boulder_msi', Subdir=['data'], $

Root_Dir=e.Root_Dir)

View = e.GetView()

BaseRaster = e.OpenRaster(RasterFile)

Layer = View.CreateLayer(BaseRaster)

roiLayer = Layer.AddRoi(Task.OUTPUT_ROI)

Syntax

Result = ENVITask('MergeROI')

Input parameters (Set, Get): INPUT_ROIS, OPERATION, OUTPUT_ROI_URI, ROI_COLOR, ROI_NAME

Output parameters (Get only): OUTPUT_ROI

Parameters marked as "Set" are those that you can set to specific values. You can also retrieve their current values any time. Parameters marked as "Get" are those whose values you can retrieve but not set.